Wikileaks, though technically not a wiki, provides an easy means to disseminate information that some find it desirable to share against the wishes of those who find it desirable to keep secret. Aside from the morality of the leaking itself, such a service provides a look into the activities of...
Corral the zombies, then shoot them when they're in a big group.
There are jumps in some of the arenas, but it's usually best to keep your wheels on the ground.
Obstacles will flash red if they're about to pop out of the arena floor.